Gas-engine construction



Aug. 19, 1930.

, @will ATTORNEY Patented Aug. 19, 1930 UNITEDY STATES PATENT OFFICE CHARLES SIMEON BUSQUE, OF BROOKLYN, NEW YORK GAS-ENGINE CONSTRUCTION Y i Application filed September 12, 1928. Serial No. 305,453.

and the explosion cycles formingso'mething of a cushion on the piston head, tending to minimize 'the violence of the explosion and are the first to leak past the piston rings, if any leak, and be exhausted outside of the cylinder. n

It is believed that the advantages derived from this construction are a considerable economy of operation and double power for a given size and weight of engine.

As this construction is applied to valveless engines there is absolutely no loss of gas to occur in the valve openings, and itis believed that none can occur past the piston rings as Twoy cycle gas engine construction.

The present invention relates to cylinder and piston of two-cycle gas engine, radial and others, and is more particularly ooncerned with piston which is so constructed as to do away completely with all loss of unburnt gases which is particularly existing in engines of the above mentioned types already in use. Y

In the present construction, the head of the piston is formed concave and of a lesser diameter than the rest of the body of the pist0n leaving a free space between said head and the wall of the cylinder where the incoming gases under `pressure are rushed through a plurality of intake ports, placed at equal ydistances around the cylinder, against this part of the piston head which diverts the flow of these gases upwardly and ina continuous stream along the wall and head of the cylinder, thus evenly filling the cylinder from the outside and head and scavenging the burnt and inert gases tothe center of the cylinder and down into an exhaust port formed into the center of the head of the piston, which itself opens out into a plurality of other exhaust ports radiating outwardly of the piston and at angle from the horizontal, and which ports carry these gases into a plurality of corresponding exhaust ports formed in the wall of the cylinder.

It will be noticed that the pressure of the burnt and unburnt gases from the cylinder chamber and from the exhaust ports of the piston against the cylinder wall is the same at these points whether during the compression or explosion cycles,and as a plurality of piston rings are interposed between the ex-A haust ports of the piston and its head and the intake ports there is no tendency from the incoming gases to escape past these springs and be lost with the already burnt gases and no leakage can occur at that point, and in consequence the whole of thecharge is submitted to the explosion and turned into power.

Again, as there is some of the burnt gases left in the cylinder after each explosion, these inert gases are compressed into the exhaust ports of the piston during the Compression ing the escape of those unburnt gases past the piston rings. y

The invention is fully disclosed in the following description and in the accompanying drawing, which is a'central vertical section of an engine. Y

The body of the piston is formed at its head with a rim l which is of a lesser diameter than the rest ofy the body.

Inwardly of the rim l the head is'concaved at 2 and in the center of the head Yis recessed an exhaust port 3 which itself radiates into a plurality of other exhaust ports 4 to the outside of the piston.

rality of other exhaust ports 5 which are formed into the body of the cylinder carrying the burnt gases out.

Between the rim and the exhaust ports of the piston is placed a piston ring 6.

Around the piston and completely surrounding the exhaust ports is placed another wide piston ring 7 with cut-out sections to receive the ends of the exhaust ports checking the escape of gases laterally and longitudinally.

Other rings 8 are placed at the base of the piston and adjacent to exhaust port ring 9.

Having thus Jfully described the invention, what I claim asV new and desire to protect by Letters Patent is In a two cycle gas engine a piston, comprising a main body, a rim at the head thereof of a lesser diameter than said body, thereby forming a space therebetween and the cylinthe already burnt and inert gases are check- These exhaust ports correspond to a lpluf der Wall, a concave depression in the end of said body inwardly of said rim, a central port, leading downwardly from said depression, a plurality of downwardly and outwardly inclined exhaust ports radiating from said central port, exhaust ports in the cylinder walls, positioned opposite to the outlets of said piston ports during one position of the piston, a plurality of relatively narrow piston rings at one 0r more ends of the piston, and a centrally positioned relatively wide piston ring, having therein openings, registering with the outlets of said piston ports, to permit the passage of the exhaust gases 4 therethrough troni said piston ports to said cylinder ports.

In testimony whereof, I have signed my naine to this specication this 11th day of September 1928.

CHARLES SIMEON BUSQUE. 

